Nagai Koen (Park)

Park.

One of the largest park in Osaka city.
Subway Midosuji line Nagai station right below the park.
Nagai Shokubutsuen (botanical garden) is in the park, Admission: 200 yen.

Park
http://www.ocsga.or.jp/osakapark/hfm_park/03nagai/index.html

Botanical Garden
http://www.ocsga.or.jp/n-syoku/index.html